Datasheet ADT7320 (Analog Devices) - 2

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ADT7320 Data Sheet TABLE OF CONTENTS
Features .. 1 Configuration Register .. 14 Applications ... 1 Temperature Value Register .. 15 General Description ... 1 ID Register... 15 Product Highlights ... 1 TCRIT Setpoint Register ... 15 Functional Block Diagram .. 1 THYST Setpoint Register ... 16 Revision History ... 2 THIGH Setpoint Register .. 16 Specifications ... 3 TLOW Setpoint Register ... 16 SPI Timing Specifications ... 4 Serial Interface .. 17 Absolute Maximum Ratings .. 5 SPI Command Byte .. 17 ESD Caution .. 5 Writing Data ... 18 Pin Configuration and Function Descriptions ... 6 Reading Data ... 19 Typical Performance Characteristics ... 7 Interfacing to DSPs or Microcontrol ers ... 19 Theory of Operation .. 9 Serial Interface Reset .. 19 Circuit Information .. 9 INT and CT Outputs .. 20 Converter Details.. 9 Undertemperature and Overtemperature Detection .. 20 Continuous Conversion Mode ... 9 Applications Information .. 22 One-Shot Mode .. 10 Thermal Response Time ... 22 1 SPS Mode .. 11 Supply Decoupling ... 22 Shutdown Mode .. 11 Powering from a Switching Regulator ... 22 Fault Queue ... 11 Temperature Measurement ... 22 Temperature Data Format ... 12 Quick Guide to Measuring Temperature .. 22 Temperature Conversion Formulas ... 12 Outline Dimensions ... 23 Registers ... 13 Ordering Guide .. 23 Status Register ... 13
REVISION HISTORY 12/12—Revision 0: Initial Version
Rev. 0 | Page 2 of 24 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION PRODUCT HIGHLIGHTS FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS SPI TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER DETAILS CONTINUOUS CONVERSION MODE ONE-SHOT MODE CT and INT Operation in One-Shot Mode 1 SPS MODE SHUTDOWN MODE FAULT QUEUE TEMPERATURE DATA FORMAT TEMPERATURE CONVERSION FORMULAS 16-Bit Temperature Data Format 13-Bit Temperature Data Format 10-Bit Temperature Data Format 9-Bit Temperature Data Format REGISTERS STATUS REGISTER CONFIGURATION REGISTER TEMPERATURE VALUE REGISTER ID REGISTER TCRIT SETPOINT REGISTER THYST SETPOINT REGISTER THIGH SETPOINT REGISTER TLOW SETPOINT REGISTER SERIAL INTERFACE SPI COMMAND BYTE WRITING DATA READING DATA INTERFACING TO DSPs OR MICROCONTROLLERS SERIAL INTERFACE RESET INT AND CT OUTPUTS UNDERTEMPERATURE AND OVERTEMPERATURE DETECTION Comparator Mode Interrupt Mode APPLICATIONS INFORMATION THERMAL RESPONSE TIME SUPPLY DECOUPLING POWERING FROM A SWITCHING REGULATOR TEMPERATURE MEASUREMENT QUICK GUIDE TO MEASURING TEMPERATURE OUTLINE DIMENSIONS ORDERING GUIDE